I have a survey and I'm trying to get it to automatically create a token on another survey once they reach a certain question.

Is there any way I can get lime to call a page that will create a token for another survey without the respondent knowing it?

At the end of a survey you can auto-redirect the user to a PHP script which does the token creation. Afterwards you can redirect the user to a predefined end page.
Loading the PHP script is something the user won't really recognize.

Another solution is to use javascript to call the PHP file at survey runtime.